public GeneratorNode CreateItemsGeneratorNode(
IList collection,
GeneratorNode parent,
GeneratorNode previous,
GeneratorNode next)
{
Debug.Assert(collection != null, "collection cannot be null for CreateItemsGeneratorNode()");
INotifyCollectionChanged notifyCollection = collection as INotifyCollectionChanged;
Debug.Assert(notifyCollection != null, "collection must be a INotifyCollectionChanged for CreateItemsGeneratorNode()");
ItemCollection itemCollection = collection as ItemCollection;
if (itemCollection != null)
{
DataGridCollectionView dgcv = itemCollection.SourceCollection as DataGridCollectionView;
if (dgcv != null)
{
collection = dgcv;
}
}
ItemsGeneratorNode node = new ItemsGeneratorNode(collection, parent);
this.SetupCollectionGeneratorNode(node, parent, previous, next);
node.AdjustLeafCount(node.Items.Count);
return(node);
}
public GeneratorNode CreateItemsGeneratorNode(
IList collection,
GeneratorNode parent,
GeneratorNode previous,
GeneratorNode next,
CustomItemContainerGenerator generator)
{
Debug.Assert(collection != null, "collection cannot be null for CreateItemsGeneratorNode()");
Debug.Assert(generator != null);
INotifyCollectionChanged notifyCollection = collection as INotifyCollectionChanged;
Debug.Assert(notifyCollection != null, "collection must be a INotifyCollectionChanged for CreateItemsGeneratorNode()");
//case 113904: If the item source for the ItemsGeneratorNode is an ItemCollection, then
//check if the underlying SourceCollection is a DataGridCollectionView.
//This particular exception case is there to handle messaging quirks in the case
//of Master Detail edition. Refer to case for more details.
ItemCollection itemCollection = collection as ItemCollection;
if (itemCollection != null)
{
DataGridCollectionView dgcv = itemCollection.SourceCollection as DataGridCollectionView;
if (dgcv != null)
{
collection = dgcv;
}
}
ItemsGeneratorNode node = new ItemsGeneratorNode(collection, parent);
this.SetupCollectionGeneratorNode(node, parent, previous, next);
node.AdjustLeafCount(node.Items.Count);
return(node);
}
private void HandleItemMoveRemoveReplaceHelper( ItemsGeneratorNode node, NotifyCollectionChangedEventArgs e, int nodeIndex )
{
node.AdjustItemCount( e.NewItems.Count );
node.AdjustLeafCount( e.NewItems.Count );
this.IncrementCurrentGenerationCount();
//this is used to notify any Master Generator that it must update its content's status (UpdateGenPosToIndexList)
this.SendAddEvent( new GeneratorPosition( -1, 1 ), nodeIndex + e.NewStartingIndex, e.NewItems.Count );
}
private void HandleItemRemoveMoveReplace( ItemsGeneratorNode node, NotifyCollectionChangedEventArgs e )
{
GeneratorNodeHelper nodeHelper = new GeneratorNodeHelper( node, 0, 0 ); //index not important for now.
nodeHelper.ReverseCalculateIndex();
node.AdjustItemCount( -e.OldItems.Count );
node.AdjustLeafCount( -e.OldItems.Count );
int nodeStartIndex = e.OldStartingIndex;
int nodeEndIndex = nodeStartIndex + e.OldItems.Count - 1;
int detailCountToRemove = CustomItemContainerGenerator.ComputeDetailsCount( node, nodeStartIndex, nodeEndIndex );
int detailCountBeforeRemovedItems = 0;
if( nodeStartIndex > 0 )
{
detailCountBeforeRemovedItems = CustomItemContainerGenerator.ComputeDetailsCount( node, 0, nodeStartIndex - 1 );
}
int startIndex = nodeHelper.Index + e.OldStartingIndex + detailCountBeforeRemovedItems;
int endIndex = startIndex + detailCountToRemove + e.OldItems.Count - 1;
int removeCount = e.OldItems.Count + detailCountToRemove;
int replaceCount = ( e.Action == NotifyCollectionChangedAction.Replace ) ? e.NewItems.Count : 0;
// *** RemoveDetails must be done before GeneratorPositionFromIndex, since GeneratorPositionFromIndex will indirectly do a RemapFloatingDetails
// *** that will cause the index to already be rectified and make a double rectification to occurs.
//Remove the details from the ItemsGeneratorNode and re-index the other details appropriatly.
this.RemoveDetails( node, nodeStartIndex, nodeEndIndex, replaceCount );
GeneratorPosition removeGenPos = this.GeneratorPositionFromIndex( startIndex );
//Try to remap the old item for detail remapping (will do nothing if item has no details )
foreach( object oldItem in e.OldItems )
{
this.QueueDetailItemForRemapping( oldItem );
}
//if the node is totally expanded
if( node.IsComputedExpanded )
{
List<DependencyObject> removedContainers = new List<DependencyObject>();
int genRemCount = this.RemoveGeneratedItems( startIndex, endIndex, removedContainers );
this.IncrementCurrentGenerationCount();
this.SendRemoveEvent( removeGenPos, startIndex, removeCount, genRemCount, removedContainers );
}
//then, based on the action that was performed (move, replace or remove)
switch( e.Action )
{
case NotifyCollectionChangedAction.Move:
this.OffsetDetails( node, e.NewStartingIndex, e.NewItems.Count );
this.HandleItemMoveRemoveReplaceHelper( node, e, nodeHelper.Index );
break;
case NotifyCollectionChangedAction.Replace:
this.HandleItemMoveRemoveReplaceHelper( node, e, nodeHelper.Index );
break;
case NotifyCollectionChangedAction.Remove:
// Do nothing!
break;
case NotifyCollectionChangedAction.Add:
case NotifyCollectionChangedAction.Reset:
default:
throw new DataGridInternalException();
}
}
public GeneratorNode CreateItemsGeneratorNode(
IList collection,
GeneratorNode parent,
GeneratorNode previous,
GeneratorNode next,
CustomItemContainerGenerator generator )
{
Debug.Assert( collection != null, "collection cannot be null for CreateItemsGeneratorNode()" );
Debug.Assert( generator != null );
INotifyCollectionChanged notifyCollection = collection as INotifyCollectionChanged;
Debug.Assert( notifyCollection != null, "collection must be a INotifyCollectionChanged for CreateItemsGeneratorNode()" );
ItemCollection itemCollection = collection as ItemCollection;
if( itemCollection != null )
{
DataGridCollectionView dgcv = itemCollection.SourceCollection as DataGridCollectionView;
if( dgcv != null )
{
collection = dgcv;
}
}
ItemsGeneratorNode node = new ItemsGeneratorNode( collection, parent );
this.SetupCollectionGeneratorNode( node, parent, previous, next );
node.AdjustLeafCount( node.Items.Count );
return node;
}
public GeneratorNode CreateItemsGeneratorNode(
IList collection,
GeneratorNode parent,
GeneratorNode previous,
GeneratorNode next,
CustomItemContainerGenerator generator )
{
Debug.Assert( collection != null, "collection cannot be null for CreateItemsGeneratorNode()" );
Debug.Assert( generator != null );
INotifyCollectionChanged notifyCollection = collection as INotifyCollectionChanged;
Debug.Assert( notifyCollection != null, "collection must be a INotifyCollectionChanged for CreateItemsGeneratorNode()" );
//case 113904: If the item source for the ItemsGeneratorNode is an ItemCollection, then
//check if the underlying SourceCollection is a DataGridCollectionView.
//This particular exception case is there to handle messaging quirks in the case
//of Master Detail edition. Refer to case for more details.
ItemCollection itemCollection = collection as ItemCollection;
if( itemCollection != null )
{
DataGridCollectionView dgcv = itemCollection.SourceCollection as DataGridCollectionView;
if( dgcv != null )
{
collection = dgcv;
}
}
ItemsGeneratorNode node = new ItemsGeneratorNode( collection, parent );
this.SetupCollectionGeneratorNode( node, parent, previous, next );
node.AdjustLeafCount( node.Items.Count );
return node;
}
